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  1. J

    Canon N670U Scanner was working, now its not, please help

    Hi There I brought this scanner (CanoScan N670U) a few months ago and it was working perfectly up until about 3 or 4 weeks ago. My operating system is Windows XP. I have been using the CanoScan Toolbox, and suddenly this stopped working, saying: "Unable to open TWAIN source Please check...
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